272 
AUG. F. FOERSTE 
8. Deltoceras (?) sp. 
Plate XXVII, fig. 6; Plate XXXIII, figs. 6 A, B, C 
Cyrtoceraconic shell of uncertain genus, Holtedahl, Paleozoic 
Series of Bear Island, 1919, p. 130, p. 13, fig. 2. 
Nautiloid shell, with volutions strongly compressed laterally, 
the dorso-ventral diameter of the specimen being 33 mm.; and 
the lateral diameter 20 mm. The siphuncle is cylindrical in 
form and slightly over 3 mm. in diameter; its center is 5.5 mm. 
from the ventral wall of the volution. That part of the siphuncle 
which is exposed in the specinien is crossed at mid-length by a 
single complete septum having a concave curvature of about 7 
mm. The ventral fourth of another septum is preserved 10 
mm. from the first septum, on its orad side. Owing to the angle 
at which this part of the specimen has been cut, the passage of 
the siphuncle through this second septum is not retained. A 
third septum is exposed on the apical side of the first mentioned 
septum, at a distance of 11 mm. from the latter. This third 
septum is the one exposed in the figure presented by Holtedahl, 
cited above. Judging from the small curvature of the siphuncle 
and of the ventral wall of the specimen at hand, the complete 
phragmacone could easily have equalled 150 mm. in diameter 
measured across the volutions, and the complete shell probably 
was considerably larger. 
From the curvature of the septum at the apical end of the 
specimen it is evident that the sutures of the septa had broad 
lateral lobes and also dorsal and ventral saddles; the general 
appearance of the saddles must have been affected by the strong 
lateral compression of the conch. It can not be determined 
definitely from the small fragment at hand whether the specimen 
was transversely ribbed or not, but it is assumed that no pro- 
nounced ribbing was present. MoreoverV there is no evidence 
of an impressed zone along the dorsal side of the specimen due 
to contact with the ventral side of preceding volutions. 
Locality and Horizon. — Collected 1 kilometer west of Norsk- 
havna, or 1.4 kilometers NNW of the northern margin of South 
Harbor, on Bear Island, by Olaf Holtedahl, in July, 1918. Depos- 
